rolamite definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an almost frictionless bearing consisting of two or more rollers on a flexible metal band, that serves as a suspension system in various devices, as switches, valves, pumps, etc.
Origin: arbitrary coinage based on roll
rolamite definition by American Heritage Dictionary
A mechanism consisting of two or more hard cylindrical rollers with a flexible nonstretching band looped around them, so that the rollers move against each other with very little friction.
Origin: rol(l) + -amite, of unknown origin.
When rotated as indicated in the top illustration, the rollers and metal strip will move to the right.